Aerial stem modification
This article needs additional citations for verification. (November 2010) |
Aerial stem modifications are modifications to the
tuberous stems, and bulbils.[4][5] [6]The auxiliary or the terminal part of the modified structures shows their stem nature.[7]
Tendrils
Some weak-stemmed plants produce wiry, coiled, sensitive, and delicate organs for climbing. They are called
Thorns
These are hard, woody, pointed structures meant for protection. They are provided with
terminal buds.[13] They control transpiration
by reducing the vegetative growth.
In Punica granatum, the thorns bear leaves and branches.[18] In Carissa carandas the terminal bud produces a pair of thorns. They help in protection.[19]
Bulbils
When the axillary bud becomes fleshy and rounded due to the storage of food, it is called bulb[20]l. It gets detached from the plant, falls on the ground, and develops into a new plant. e.g. Dioscorea.[21] It is in the axel (the space between the leaf and stem).[22]
Cladode
These are green branches of limited growth (usually one internode long) that have taken up the functions of photosynthesis.[23] True leaves are reduced to scales or spines, e.g. Asparagus.[24]
References
- S2CID 248645066.
- ISBN 9780429181733, retrieved 2023-09-23
- .
- ISBN 9780429167904, retrieved 2023-09-23
- , retrieved 2023-09-23
- , retrieved 2023-09-23
- ISSN 1754-8705.
- ISBN 9780521794015.
- )
- ISBN 9782760630994, retrieved 2023-09-23
- S2CID 241468632, retrieved 2023-09-23
- ISBN 978-3-030-05335-2, retrieved 2023-09-23
- ISBN 978-3-540-76455-7, retrieved 2023-09-23
- . Retrieved 2023-09-23.
- ISBN 978-1-4020-4584-4, retrieved 2023-09-23
- ISBN 978-3-7091-9604-5, retrieved 2023-09-23
- )
- ISBN 978-1-4020-4584-4, retrieved 2023-09-23
- S2CID 253991500. Retrieved 2023-09-23.
- S2CID 239989681
- ISBN 978-1-4020-4584-4, retrieved 2023-09-23
- ISBN 978-3527600908, retrieved 2023-09-23
- ISBN 9780521794015.
- ISBN 978-1-4020-4584-4, retrieved 2023-09-23